package com.FH.util;

import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;

import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ExportExcel<T> {

    public void exportExcel(String title, Collection<T> dataset, OutputStream out) {
        exportExcelFile(title, null, dataset, out, "yyyy-MM-dd");
    }

    public void exportExcel(String title,String[] headers, Collection<T> dataset,
                            OutputStream out) {
        exportExcelFile(title, headers, dataset, out, "yyyy-MM-dd");
    }

    public void exportExcel(String title,String[] headers, Collection<T> dataset,
                            OutputStream out, String pattern) {
        exportExcelFile(title, headers, dataset, out, pattern);
    }

    private void exportExcelFile(String title, String[] headers,
                                 Collection<T> dataset, OutputStream out, String pattern) {
        // 声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 生成一个表格
        HSSFSheet sheet = workbook.createSheet(title);
        // 设置表格默认列宽度为15个字节
        sheet.setDefaultColumnWidth(15);
        // 生成一个样式
        HSSFCellStyle style = workbook.createCellStyle();
        // 设置这些样式
        style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        // 生成一个字体
        HSSFFont font = workbook.createFont();
        font.setColor(HSSFColor.VIOLET.index);
        font.setFontHeightInPoints((short) 12);
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字体应用到当前的样式
        style.setFont(font);
        // 生成并设置另一个样式
        HSSFCellStyle style2 = workbook.createCellStyle();
        style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
        style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
        style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
        style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        // 生成另一个字体
        HSSFFont font2 = workbook.createFont();
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
        // 把字体应用到当前的样式
        style2.setFont(font2);
        // 声明一个画图的顶级管理器
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 定义注释的大小和位置,详见文档
        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
                0, 0, 0, (short) 4, 2, (short) 6, 5));
        // 设置注释内容
        comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
        // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
        comment.setAuthor("leno");
        // 产生表格标题行
        HSSFRow row = sheet.createRow(0);
        for (int i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            cell.setCellStyle(style);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }
        // 遍历集合数据，产生数据行
        Iterator<T> it = dataset.iterator();
        int index = 0;
        while (it.hasNext()) {
            index++;
            row = sheet.createRow(index);
            T t = (T) it.next();
            // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
            Field[] fields = t.getClass().getDeclaredFields();
            HSSFFont font3 = workbook.createFont();
            font3.setColor(HSSFColor.BLUE.index);
            for (int i = 0; i < fields.length; i++) {
                HSSFCell cell = row.createCell(i);
                cell.setCellStyle(style2);
                Field field = fields[i];
                String fieldName = field.getName();
                String getMethodName = "get"
                        + fieldName.substring(0, 1).toUpperCase()
                        + fieldName.substring(1);
                try {
                    Class tCls = t.getClass();
                    Method getMethod = tCls.getMethod(getMethodName,
                            new Class[] {});
                    Object value = getMethod.invoke(t, new Object[] {});
                    // 判断值的类型后进行强制类型转换
                    String textValue = null;

                    if (value instanceof Boolean) {
                        boolean bValue = (Boolean) value;
                        textValue = "男";
                        if (!bValue) {
                            textValue = "女";
                        }
                    } else if (value instanceof Date) {
                        Date date = (Date) value;
                        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
                        textValue = sdf.format(date);
                    } else if (value instanceof byte[]) {
                        // 有图片时，设置行高为60px;
                        row.setHeightInPoints(60);
                        // 设置图片所在列宽度为80px,注意这里单位的一个换算
                        sheet.setColumnWidth(i, (short) (35.7 * 80));
                        // sheet.autoSizeColumn(i);
                        byte[] bsValue = (byte[]) value;
                        HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
                                1023, 255, (short) 6, index, (short) 6, index);
                        anchor.setAnchorType(2);
                        patriarch.createPicture(anchor, workbook.addPicture(
                                bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
                    } else {
                        // 其它数据类型都当作字符串简单处理
                        textValue = value!=null?value.toString():"";
                    }
                    // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
                    if (textValue != null) {
                        Pattern p = Pattern.compile("^//d+(//.//d+)?$");
                        Matcher matcher = p.matcher(textValue);
                        if (matcher.matches()) {
                            // 是数字当作double处理
                            cell.setCellValue(Double.parseDouble(textValue));
                        } else {
                            HSSFRichTextString richString = new HSSFRichTextString(
                                    textValue);

                            richString.applyFont(font3);
                            cell.setCellValue(richString);
                        }
                    }
                } catch (SecurityException e) {
                    e.printStackTrace();
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                } finally {
                    // 清理资源
                }
            }
        }

        int k4 = 2;

        if(sheet.getLastRowNum() > 3 && (title.equals("部门周计划") || title.equals("作息时间表") || title.indexOf("签到统计")!=-1)){

            for(int i=1;i<= sheet.getLastRowNum();i++){
                HSSFRow rows = sheet.getRow(i);
                HSSFCell cells0 = rows.getCell(0);

                HSSFRow rows1 = null;
                HSSFCell cells1 = null;
                if(i+1 <= sheet.getLastRowNum()){
                    rows1 = sheet.getRow(i+1);
                    cells1 = rows1.getCell(0);
                }
;
                if (cells1!= null && cells0.getStringCellValue().equals(cells1.getStringCellValue()) ){

                    sheet.addMergedRegion(new CellRangeAddress(i,i+1,0,0));
                    HSSFRow rowsV = sheet.getRow(i);
                    HSSFCell cellsV = rows.getCell(1);
                    cellsV.setCellStyle(style2);
                }
            }

        }


        try {
            workbook.write(out);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public String createExcelFile(ExportExcel<T> ex,String title,String[] headers,List<T> dataset,String filename){
        String downloadUrl = "";
        try {
            String outFilePath = "";
            String downLoadPath = "";

            String unloadPath = "";

            //获取当前工程目录
            File f = new File(System.getProperty("user.dir"));

            //获取操作系统类型
            String os = System.getProperty("os.name");

            //判断操作系统类型
            if(os.toLowerCase().startsWith("win")){
                //excel在服务器中所在路径
                downLoadPath = "/download/excel/";
                unloadPath = f.getParent().replaceAll("\\\\","/") + "/welcome-content" + downLoadPath;
            }
            else{
                //excel在服务器中所在路径
                downLoadPath = "/download/excel/";
                unloadPath = f.getParent() + "/welcome-content" + downLoadPath;
            }


            File dirFile = new File(unloadPath);
            //如果dir对应的文件不存在，或者不是一个目录，则退出
            if (!dirFile.exists() || !dirFile.isDirectory()) {
                dirFile.mkdirs();
            }

            outFilePath = unloadPath + filename + ".xls";

            //输出文档路径及名称
            File outFile = new File(outFilePath);
            if (!outFile.exists()) {
                outFile.createNewFile();
            }



            //构造输出流输出文档
            OutputStream out = new FileOutputStream(outFile);
            ex.exportExcel(title, headers, dataset, out);
            out.close();
            System.out.println("excel导出成功！");

            downloadUrl = downLoadPath + filename + ".xls";
        }catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return downloadUrl;
    }
}
